<template>
  <div>
     <!-- 面包屑导航区 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
          <!-- 2. 为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 650px;height:300px;"></div>   
    </el-card>
  </div>
</template>

<script>
import * as echarts from 'echarts'
import _ from 'lodash'
export default {
        data() {
        return {
            // 需要合并的数据
            options: {
                title: {
                    text: '用户来源'
                },
                tooltip: {
                    trigger: 'axis',
                    axisPointer: {
                        type: 'cross',
                        label: {
                        backgroundColor: '#E9EEF3'
                        }
                    }
                },
                grid: {
                    left: '3%',
                    right: '4%',
                    bottom: '3%',
                    containLabel: true
                },
                xAxis: [
                {
                    boundaryGap: false
                }
                ],
                yAxis: [
                {
                    type: 'value'
                }
                ]
            }
        }
  },
  // 此时,页面上的元素,已经被渲染完毕了
  async mounted() {
        // 3. 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'))

        const { data: res } = await this.$http.get('reports/type/1')
        if (res.meta.status !== 200) {
        return this.$message.error('获取折线图数据失败!')
        }
        // 4. 指定图表的配置项和数据
        const result = _.merge(res.data, this.options)
        // 5. 使用刚指定的配置项和数据显示图表。
        myChart.setOption(result)
    }
}
</script>

<style lang="less" scoped>

</style>